Chemical Engineering MCQs

Page No. 140

Pick out the wrong statement ?


a At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

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bNormally, the gases which are easily liquefied are more soluble in common solvents

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cThe gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents

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dAt constant pressure, solubility of a gas in a liquid increases with rise in temperature

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Maximum carbon content in cast iron is ______________ percent?


a3.8

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b5.2

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c4.8

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d4.3

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View Answer 4.3

In a homogeneous solution, the activity co-efficient of a component depends upon the_________________?


aPressure

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bComposition

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cTemperature

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dAll (A), B. and (C)

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View Answer All (A), B. and (C)

Cast iron is__________________?


aUsed for making shock resisting parts

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bManufactured in cupola and is brittle

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cHaving compressive strength more than its tensile strength

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dAll A., B. & C.

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View Answer All A., B. & C.

The main feature of Carnot refrigeration cycle is that, it________________________?


aDoes not need the addition of external work for its functioning

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bTransfers heat from high temperature to low temperature

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cAccomplishes the reverse effect of the heat engine

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dNone of these

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Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with______________?


aAcidic refractory

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bRubber

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cKarbate

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dLead or acid proof bricks

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View Answer Acidic refractory

Manganese in steel affects its__________________?


aDuctility

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bTensile strength

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cHardness

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dNone of these

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View Answer Ductility

High carbon steel contains more than _____________ percent carbon?


a0.5

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b2.2

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c2.5

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d2.8

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View Answer 0.5

Which of the following processes cannot be made reversible even under ideal condition of operation ?


aFree expansion of a gas

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b Compression of air in a compressor

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cExpansion of steam in a turbine

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dAll (A), B. & (C)

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Which of the following has no effect on the carbide forming tendency in steels ?


aMolybdenum

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bPhosphorus

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cChromium

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dVanadium

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View Answer Phosphorus

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